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FunctionCall helper class

Instructor offers FunctionCall class to extract arguments of a function or method from content.

This is useful when you want to build tool use capability, e.g. for AI chatbots or agents.

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Extracting arguments for a function

<?php

use Cognesy\Instructor\Extras\FunctionCall\FunctionCall;

use Cognesy\Instructor\Instructor;



/** Save user data to storage */

function saveUser(string $name, int $age, string $country) {

    // ...

}



$text = "His name is Jason, he is 28 years old and he lives in Germany.";

$args = (new Instructor)->respond(

    messages: $text,

    responseModel: FunctionCall::fromFunctionName('saveUser'),

);



// call the function with the extracted arguments

saveUser(...$args);

?>

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Extracting arguments for a method call

<?php

use Cognesy\Instructor\Extras\FunctionCall\FunctionCall;

use Cognesy\Instructor\Instructor;



class DataStore {

    /** Save user data to storage */

    public function saveUser(string $name, int $age, string $country) {

        // ...

    }

}



$text = "His name is Jason, he is 28 years old and he lives in Germany.";

$args = (new Instructor)->respond(

    messages: $text,

    responseModel: FunctionCall::fromMethodName(Datastore::class, 'saveUser'),

);



// call the function with the extracted arguments

(new DataStore)->saveUser(...$args);

?>

​
Extracting arguments for a callable

<?php

use Cognesy\Instructor\Extras\FunctionCall\FunctionCall;

use Cognesy\Instructor\Instructor;



/** Save user data to storage */

$callable = function saveUser(string $name, int $age, string $country) {

    // ...

}



$text = "His name is Jason, he is 28 years old and he lives in Germany.";

$args = (new Instructor)->respond(

    messages: $text,

    responseModel: FunctionCall::fromCallable($callable),

);



// call the function with the extracted arguments

$callable(...$args);

?>
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